Burner for mixed gas and air



(No Model.)

O. M. SHANNON.

BURNER FOR MIXED GAS AND AIR. No. 429,066. Patented May 27, 1890.

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s PLYEIIS cu., mom-mum, wxsmucrou n c UNITED STATES PATENT OFFICE.

OSCAR M. SHANNON, OF CHICAGO, ILLINOIS.

BURNER FOR MIXED GAS AND AIR.

SPECIFICATION forming part of Letters Patent No. 429,066, dated May 27,1890.

Application filed August 19, 1889. Serial No. 321,203. (No model.)

To all whom it may concern.-

Be it known that I, OSCAR M. SHANNON, of Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin Burners for Mixed Gas and Air; and I do hereby declare that thefollowing is a full, clear, and exactdescription thereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, which form a part of this specification.

This invention relates to burners for the combustion of mixed gas andair; and it has for its object to provide a construction in which theburner may be given large flame area, and in which all the jets orflames shall burn with substantially uniform size, force, and color. Itis also an object of the invention to provide a construction by whichthe burner may be given such large flame area and the othercharacteristics above enumerated without providing passages through thebody of the burner by which cold air may rise into contact with thearticle to be heated.

In the drawings, Figure 1 is a side elevation of the burner and of theair-injector and the gas-inlet pipe provided with a valve. Fig. 2 is atop view of the lower part or plate of the burner and the gas and airinjecting connections shown in Fig. 1, the top plate present in Fig. 1being removed. Fig. 3 is a transverse section of the complete burner inthe line 3 3 of Fig. 1.

The burner is composed of two plates-to wit, a bottom plate A and a topplate A. The bottom plate has a central downwardlyprojecting chamber AThis chamber is laterally extended in opposite directionsbyshallowdepressions a at, here shown as being formed in the upper surface of thebottom plate A. Into one end or side of the chamber A is inserted thegas and air pipe B, arranged in a horizontal direction, so that theinflowing current of gas and air is "projected against the oppositevertical side or end of the chamber A The top plate A at its rim 0, fitsclosely against the marginal surface of the bottom plate A; but insidethis rim said top plate is provided with a series of interior grooves aExteriorly the plate is correspondingly ribbed, each groove a beingwithin an external rib a The plate A rests upon and is bolted to thebottom plate A by any suitable number of bolts a; or the plates may besecured together by any other suitable fastening, cement or other meansbeing commonly placed between the rim a and the margin of the bottomplate A to make atight joint. In applying the plate A to the plate A thegrooves a in the top plate are arranged to run transversely to the innerrecesses a in the bottom plate, said recesses extending to the outermostgrooves a of the top plate. As a consequence each of said grooves orpassages a is in communication through the recesses a with the chamber Aso that all these grooves or passages may be supplied with gas admittedto said chamber. Along the apex of each of the ribs a are formedsuitable openings for the emission of gas. Said openings may be eitherlongitudinal or transverse slits or circular perforations, as may bepreferred. When a central groove 6L2 in the top plate passes directlyover the central chamber A in the bottom plate, a narrow strip of tin orother sheet metal a may be advantageously laid across to partly coversaid recess or chamber A as seen in Figs. 2 and 3, to prevent a tooforcible passage of the gas through those slits or orifices for thefiame-jets, which lead from said central groove a immediately over saidchamber. A suitable depression will desirably be cast in the uppersurface of the bottom plate A to receive this thin plate ed, as alsoindicated in Figs. 2 and 3. It will of course be understood that thelateral extensions a of the chamber A may be formed in the under surfaceof the top plate instead of in the upper surface of the bottom plate.

I11 a burner constructed as described it is found that the flamesemerging from all of the perforations or slit-s will be substantiallyuniform in size, force, and color, indicating that there is asubstantially equal distribution of gas under equal pressure and in auniform state of mixture at all the flame orifices or at all points ofthe burner.

I claim as my invention- 1. The burner described, composed of aflattopped bottom plate provided with a receiv' ing-chamber for gasbelow its upper surface, and a top plate provided with a plurality ofgrooves in its otherwise plain under surface,

from which grooves passages lead to the flames, said plates beingfastened close together, and a transverse passage being provided givingcomn'innicat-ion from the receiving-chamber to the grooves.

2. The burnerdescribed, composed of a top plate provided with a seriesof grooves in its otherwise plain under surface, from which groovespassages lead to the flames, a flattopped bottom plate having a centralgas-receivin g chamberbelow its upper surface, said plates beingfastened close together, and transverse passages being provided to give

